use tracing::info;

use crate::repository::{Direction, OpenRepository};

use super::{GitRemote, RepoDetails};

#[tracing::instrument(skip_all)]
pub fn validate(repository: &OpenRepository, repo_details: &RepoDetails) -> Result<()> {
    let Some(push_remote) = repository.find_default_remote(Direction::Push) else {
        return Err(Error::NoDefaultPushRemote);
    };
    let Some(fetch_remote) = repository.find_default_remote(Direction::Fetch) else {
        return Err(Error::NoDefaultFetchRemote);
    };
    let git_remote = repo_details.git_remote();
    info!(config = %git_remote, push = %push_remote, fetch = %fetch_remote, "Check remotes match");
    if git_remote != push_remote {
        return Err(Error::MismatchDefaultPushRemote {
            found: push_remote,
            expected: git_remote,
        });
    }
    if git_remote != fetch_remote {
        return Err(Error::MismatchDefaultFetchRemote {
            found: fetch_remote,
            expected: git_remote,
        });
    }
    Ok(())
}

type Result<T> = core::result::Result<T, Error>;
#[derive(Debug, derive_more::Display)]
pub enum Error {
    NoDefaultPushRemote,
    NoDefaultFetchRemote,
    NoUrlForDefaultPushRemote,
    NoHostnameForDefaultPushRemote,
    UnableToOpenRepo(String),
    Io(std::io::Error),
    #[display("MismatchDefaultPushRemote(found: {found}, expected: {expected})")]
    MismatchDefaultPushRemote {
        found: GitRemote,
        expected: GitRemote,
    },
    #[display("MismatchDefaultFetchRemote(found: {found}, expected: {expected})")]
    MismatchDefaultFetchRemote {
        found: GitRemote,
        expected: GitRemote,
    },
}
impl std::error::Error for Error {}